Cooler Master Cool Drive Lite
 

If you're only interested in cooling, and your case already does an
adequate job of keeping your hard drive cool, this is not a required
purchase. On the other hand, the Cool Drive Lite does shield some of the
hard drive noise, and the included fan is essentially silent so if you're
building a silent PC, you might want to give the Cool Drive Lite some
consideration.

http://www.viperlair.com/reviews/coo...ldrive/LHDV07/